body {
    background-image: url(../photo/美女.jpg);
    background-attachment: fixed;
    background-size: cover;
    background-repeat: no-repeat;
}

.mian {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

h1 {
    font-size: 60px;
    color: #6500d2;
    margin-top: 200px;
    margin-bottom: 80px;
}

a {
    font-size: 40px;
    color: #000;
    text-decoration: none;
    background-color: skyblue;
    margin-bottom: 20px;
    width: 250px;
    height: 100px;
    text-align: center;
    line-height: 100px;
    border-radius: 20px;
}